| 摘要 |
PURPOSE:To obtain a simple and inexpensive no-power supply signal generator with no use of a power supply such as a battery, etc. by using a piezoelectric element as a signal generating source. CONSTITUTION:One pole of a piezoelectric element 1 is earthed 5, and the other pole is connected to a voltage dividing circuit 3. An operation button 2 is used to generate the 1-pulse type voltage from the element 1 and also to apply instantaneously the intensive pressure to the element 1. The 1-pulse type voltage which is produced from the element 1 with operation of the button 2 is applied to an antenna 4 via the circuit 3. Then the antenna 4 radiates the applied divided voltage of the element 1 into the air in the form of signal waves. Thus it is possible to obtain a simple and inexpensive no-power supply signal generator with no use of a power supply such as a battery, etc. |
